Redirecting if cart is empty and activating the empty cart link

app/controllers/spree/orders_controller_decorator.rb

@@ -11,6 +11,16 @@ Spree::OrdersController.class_eval do
   include OrderCyclesHelper
   layout 'darkswarm'
 
+  # Patching to redirect to shop if order is empty
+  def edit
+    @order = current_order(true)
+    if @order.line_items.empty?
+      redirect_to main_app.shop_path
+    else
+      associate_user
+    end
+  end
+
   # Patch Orders#populate to populate multi_cart (if enabled)
   def populate
     if OpenFoodNetwork::FeatureToggle.enabled? :multi_cart

app/views/spree/orders/_form.html.haml

@@ -39,7 +39,8 @@
       %td#empty-cart
         / This needs help from Will - would like a link not button
         %span#clear_cart_link{"data-hook" => ""}
-          = form_tag empty_cart_path, :method => :put do
-            = submit_tag t(:empty_cart), :class => 'button alert expand small'
+          = link_to "Empty cart", empty_cart_path, method: :put
+          -#= form_tag empty_cart_path, :method => :put do
+            -#= submit_tag t(:empty_cart), :class => 'button alert expand small'
 
   = render "spree/orders/adjustments" unless @order.adjustments.eligible.blank?

spec/controllers/spree/orders_controller_spec.rb

@@ -2,12 +2,23 @@ require 'spec_helper'
 
 describe Spree::OrdersController do
   let(:distributor) { double(:distributor) }
+  let(:order) { create(:order) }
+  let(:order_cycle) { create(:simple_order_cycle) }
 
   it "redirects home when no distributor is selected" do
     spree_get :edit
     response.should redirect_to root_path
   end
 
+  it "redirects to shop when order is empty" do
+    controller.stub(:current_distributor).and_return(distributor)
+    controller.stub(:current_order_cycle).and_return(order_cycle)
+    controller.stub(:current_order).and_return order
+    order.stub_chain(:line_items, :empty?).and_return true
+    spree_get :edit
+    response.should redirect_to shop_path
+  end
+
   it "redirects to the shop when no order cycle is selected" do
     controller.stub(:current_distributor).and_return(distributor)
     spree_get :edit